Safety-hoist



H. PHILLIPS AND J. GREENWALD.

SAFETY HOIST.

APPLICATION FILED MAR. 15. 19x9.

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HOWARD PHILLiPs AND JAKE GREENWALD, OF DETROIT, MICHIGAN.

SAFETY-H0181.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed March 15, 1919. Serial No. 282,979.

To all whom it may concern: 7

Be it known that we, HOWARD PHILLIPS and JAKE GREENWALD, citizens of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Safety-Hoists, of which the following is a specification.

This invention relates to means for raising elevator doors and the principal object of the invention is to eliminate all cables and pulleys from the elevator shaft and to prevent the gates from falling.

Another object of the invention is to provide means on the gates actuated by a part on the elevator for engaging the draw bars to cause said bars to lift the gates when the elevator reaches a position opposite the gate.

The invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing our invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a front view of a portion of an elevator well showing our invention in use;

Fig. 2 is a side view with parts in section;

Fig. 3 is a cross section on line 33 of Fig. 1; and

Fig. 4 is a sectional detail showing one of the pawls.

This invention is adapted to be used on elevators where the gates are operated by a separate machine. A pair of draw bars 1 run the full length of the shaft and these bars are vertically movable by the beforementioned machine. Slots 2 are cut in the draw bars at each floor and a shoe carried by the car is used to press the pawl 3 on the gate into the slot to raise the gate.

In carrying out our invention we form guides 4 of channel iron at the sides of the gate openings for receiving the ends of the gate bars 5. These guides also form guide ways for the draw bars 1. One of the gate bars has secured to each of its ends a block 6 which slides in the guide 4. Each of these blocks is provided with a longitudinal slot 7 through which the draw bar 1 passes. The block is also provided with a slot 8 which is at right angles to the slot 7 and in this slot 8 is pivoted the pawl 3. A spring 9 tends to hold the pawl in its outward position. It will be seen that the upper part of the slot 8 is in communication with the slot 7 but there is the wall between the lower portions of these slots on which the spring 9 is secured. The block 6 is also provided with an opening 10 in its side which isin alinement with the upper part of the slot 8 and this opening is adapted to receive a portion of the pawl when the same is in engagement with the draw bar. Each channel member 4 is provided with a slot 11 adjacent its lower end through which the back of the pawl will project when the gate is in lowered position. Each draw bar is provided with an adjustable stop 12 for limiting the downward movement thereof. These stops will engage with the upper ends of the upper guide members 45 and the stops are so arranged as to hold the draw bars with their slots opposite the pawls so that when said pawls are pressed inwardly they will engage the slots and thus when the draw bars are raised the gate will be carried up with them.

The pawls are pressed inwardly by shoes located on the car and we prefer to use the shoes forming the subject matter of the application for Letters-Patent filed November 4th, 1918, by Howard Phillips, Serial No. 261,009 and allowed December 21st, 1918.

It will be seen that when the car reaches the door opening in the elevator shaft the shoes will engage the pawls and press them inwardly into engagement with the slots 2 in the draw bars. Thus when the draw bar is raised the block 6 will also be raised and thus the gate will be opened. When the draw bars are lowered the springs will force the pawls out of engagement with the slots 2 as soon as the pawls come opposite the openings 11 in the channel members.

It is thought from the foregoing description that the advantages and novel features of our invention will be readily apparent.

We desire it to be understood that we may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What we claim is r 1. In combination with the draw bars of an elevator shaft, of guiding members for said bars, gates guided in said members and shoe engaging pawls carried by said gates and adapted to engage portions of the draw bars for causing the gates to move with the. said draw bars.

2. In combination with the drawbars' of an elevator, of guide members for the drawbars, gates having their ends engaging said guidezmembers, blocks connected to each gate and sliding in said guide members, each block having a slot therein for engaging the draw bar, a pawl carried by each block for engaging a part of the draw bar and said guide members having openings therein through which the pawls project when in inoperative position; so as to be engaged by the shoes on'the: car.

3i Gate-operating means for elevators,

comprising channel-shaped members located on each side of the door openings, blocks connected with the gates and" sliding in said members, each of said blocks having a spring-controlled pawl therein and a longitudinally-extended slot for receiving. the draw bar and each channel member having an-opening therein through which the pawl is pressed by its spring when the gate is in closed position.

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Copies of-"this patnt may-beobtained for fivecents each, by addressing the commissionerfof Patents." Washing-0011 11). 03'" In testimony whereof weafii'x oursigna- 

